eGear Guardian Dual Function Signal Light Lightest, Brightest, Toughest light in it's class. Be Seen! Omni directional light is visible to over 1 mile Waterproof up to 300 feet Uses 2 CR-2032 Batteries. Dual Function Circuitry offers Steady On Mode of over 100 hours or Flashing mode over 250 Hours. Removable clip allows light to be clipped or laced on to almost anything